Hair trimmer



June 20, 1950 N. SHAEFFER 2,512,289

HAIR TRIMMER Filed March 21, 1949 2 Sheets- Sheet 1 IIIHIIH HHHIIIINVENTOR. #005527 51145 7 52 HTTOPNEVS N. SHAEFFER June 20, 1950 HAIRTRIMMER 2 Sheets-Sheet 2 Filed'March 21 INVENTOR. #025597 SHHEFFEQQTTOQNEVS Patented June 20, 1950 2,512,289

2,512,2s9 i a i 1" l u *IIKIR TRIMME R I ---'Nortert- Shaefler, LosAngeles; Calift; assignon-by- -;}-mesne{assignmentg tmltoy P; M: Davis,Los

-Angeles -calif. r neinieeetfi ivrah 21,1949; SerialNoi eases t-Claims.(01. sa 30) This -invention rrelates tmhair trinimers oi the 1 Referring'to the drawl-ngsfi the 'comb body "generalstype employing 'a'sharpenedblade movgenerally 'designated I is provided" with a cona'ble'onth'e bo'dyr of a combz i Devices of'this 'charventional seriesout-comb teeth I I on one -end and "1 acter 'are 'shown imthecopendi'ngrapplicat-ion 'of two 'symrrietr-ical series It-and I3 ofcomb-teeth i-rRoy'Pi'Mr Davis;:S'eria1 No. 691;448, filedAugust' 6 onopposite' s'ides'=near-the other end-of='the'- comb l9;:1946;and inathecoper'iding"applil'zation of 'Norbo'dy. A carrier "M is arranged tosliddtr'ahsbert shaefier,= Serial"No; 69;885; filed January 8, verseI-yof the co'rnb -b'odyso thatthe sharpened 1949. r 1 blade generallydesignated l -may be=advanced Among the-objects of =the presentinvention are toward either Qf-theseries I2*or' I 3-.'-- A rotatable130s provide a hairtrinmier 'employing a blade? 10' control knoblB-turns a,-' piniO1fh| and this pin-ion a carrier mounted in an;improved manner onthe meshes witha -rack l 8' fixed on Y one' side ofthe *OOIIlb' bOdYebO provide-ahrivedevice for-advanccarr-ier l l. l

ing and retracting the carrier; the drive device Refer'r-ing more'partic'ul'arlyto the 1 details of having a-controlknob "ofiset'-with'respect'to the construction; 'the comb body I0 is provided with-comb body. W a lip 19 at one extreme end which formsa g'uidemore-particular object is to provide a half for the end flange 20 of thecarrier 14; The inner bridge -member cooperable with the comb body endof'the carrier His held against 'th'eeomb to zretain the controlknobimposition and-zto body H) by means ofthe half bridge member fi--provide an-improvedxguide for one-end ofthe which overhangs a -portionof the carrier aind 'blade'carrier. V M 20 provides guide surfaces 22and 23 therefor. The -:Another object--is--to -provide a 'controlknob lpinion gear may beconveniently formed' oii thewhich=is-0lfset-ywith-1!espectt0-the c0mb'body shaft 25-which-isimbeddedin-the control knob thatitprojec-tsfor a minimumdista-nc'ebeyond1 6 so that the knob' and shaft'rotateas a unit. wire-backfacecf-the-'comb and; fora'- maximum Means are provided for securelyanchoring the hdistance beyond =theirontdaceof-the comb.25'-ha1f-bridge' 2| with respectto the eomb body lu.

-;-Ot herobjects andadvantages will appear here- As shown invthedrawings this means includes a inafter. pair of'a protuberances "H-which extendinto the drawings: V soekets z'l. Margin'al lips 2-on thehalf bridge Figure l-is a top edge view of *apreferred em- 2+- areprovided with slanting surfaces 3 which -bodimentof my invention. it; 5=snap or spring over the parallel mating surfaces V igu e 2 is a sideelevationshowing the front '=D onthecomb y spfi 111gS'5 side ofthedevice. gage the side wall & for increasingfrictional re- Figure 3 isan enlarged Side elevation -partly sistance against fiseparation' of thebridge 2| 1 broken away with the half bridge removed to from the'combbody II). -It isimp'ortant that the show the drive device for advancingand retract-g half bridge remain-securely fixed to the comb ing thecarrier. I p body; and; I haveioundthat the 'protuberances 3 Figure 4 isaside elevation partly broken away a 26; lips 2; andlugs=-5-are adequateto prevent xt Showing indicia on the-half bridge 'cooperable disassemblyofthe 'parts.

indicator on the carrier for indicating Theshaft 25 is rotatablysupported in cooperatthe position of the sharpened-blade -with respectg-" 1Surfaces 23 d- 9; each of which is to the comb body, formedone-half in the comb body '10 and one- Figure 5 is a sectional viewpartly broken away half in the halfbridge 2 l Additional cooperat- .-,tt t n v at l 5.4 as shown ingsurfaces 30- are formed-in the combbodyilll in Figure 3, and'half bridge 2! to define a window 3| in whichI i Figures 6, 7 and 8are transverse sectional eleaiau h controlknob-lfiop ra s- The axis of the Yations taken substantially 0n---the lines6-6, Shaft ofise't-flwith'iespect t0 l n i lidinal 1; and 3 3'. t v 1 asShown in Figure 2, axis of the comb body so that as clearly shown Figure9 is an elevation partly broken away ure 6 h p j i a greater diwith-the-halfbridge -removed-=-showing' initial tance from the forwardface 32 of the comb-than insertion of the carrier on the -comb body. atfrom-the back face- 33. An-important feature of Figure 10"is aperspective view-"showingwthe this construction is that a relativelylarge size manner -of assem-bly of the :carrierwithrespect control knob-l6may be 'employ'ed'=f0reasy to thesharpened-blade. manipulation"between the' thumb and forefinger n r-Figure- 1 1- is a view showing'the-underside of of the" user; and yet-this 'kn'ob proje'cts only a'the"ha-1f' bridge. aru minim'um distance zt r'onr the 'reanface '33.This rear face lies against the head of the user both when the blade 15is used in conjunction with the teeth 12 and in conjunction with theteeth [3. A minimum rearward projection of the knob is therefore highlyadvantageous. On the other hand, projection of the knob from the forwardface 32 has no disadvantage since there is adequate clearance on thisside.

The knob 15 is preferably formed with a plurality of flat sides 34, andfurthermore the knob may be tapered so that one end is larger than theother if desired. The carrier M may be pro: vided with a pair of spacedlugs 35 adapted to body whereby rotation of the knob and gear serveenter the ends of the longitudinal slot 36 formed in the sharpened blade15. Transverse grooves 31 are formed in the comb body II! to provideclearance for the projecting portions of the lugs 35. The member 2| istermed a half bridge to distinguish it from constructions in which thismember extends from the control knob IE to the end of the comb bodyadjacent the lip 19. In the latter construction the full bridge enclosesthe carrier 14 and blade I for their full length. The presentconstruction'is superior in that the half bridge is of substantiallysmaller size and hence less expensive to manufacture andinstall.

It will be noted that the rack i8 is positioned between the pinion l1and the comb body and does not lie between the pinion l1 and the halfbridge 2|. This feature is particularly advantageous because turning ofthe control knob It does not apply forces which would tend to separatethe half bridge 2| from the comb body 10. The force of the thumb of theuser applied through the knob IS on the forward side 32 of the devicepasses through the pinion l1 and rack I8 directly to the comb body l0.Substantially all of the reaction force between the teeth of the pinionl1 and the teeth of the rack I8 is taken by the thumb of the user.

The device is assembled by placing the knob l6 and shaft 25 in positionand then installing the half bridge 2| on the comb body ID to maintainthe knob and shaft in position. The blade I5 is mounted on the carrierl4 and the two are assembled as a unit onto the comb body by insertingthe end guide 38 in the groove 39 and inserting the guide flange 20under the lip IS.

,The carrier l4 and blade l5 are then transversely moved manually sothat the rack l8 enters the recess 24 and engages the pinion l'l.Further movement of the carrier and blade may be accomplished byrotating the knob l6 between the thumb and forefinger. An indicator 40on the carrier l4 may coactwith suitable indicia 4i formed on theexposed surface of the half bridge 2| to indicate the relative positionof the blade l5 with respect to the comb body l0. Since .the series ofcomb teeth l2 and I3 are symmetrical and since the carrier I4 is mountedfor transverse movement between them, the same degree of projection ofone of the sharpened edges of the blade I5 may be obtained on eitherside of the comb. When the carrier I4 is in the central position neitherof the edges of the blade pro-.- p,

jects between comb teeth, and hence the blade is inoperative. Byprogressively turning the knob IS in either direction the blade may besuccessively moved from a thinning position through various cuttingpositions to the fully extended position for shaving.

Having fully described my invention, it is to be understood that I donot wish to be limited to the details herein set forth, but my inventoadvance and retract the carrier.

2. In a hair trimmer, the combination of: a comb body, a member attachedto the comb body intermediate the ends thereof cooperating with the combbody to form a recess, said member and the comb body having alignedopenings forming a window, a rotatable control knob positioned withinsaid window, a pinion gear inthe recess secured for rotationwith saidknob, a carrier for v a sharpened blade. mounted for transverse slidingmovement on thecomb body, the carrier having a guide rail .received insaid recess, and a rack formed on'the end of the carrier adjacent theguide rail and positioned between the pinion gear and the comb bodywhereby rotation of the knob and gear serve to advance and retract thecarrier.

3. In a-hair trimmer, the combination of: a combebody having a lip atone end defining a groove, a member attached to the comb bodyintermediate the ends thereof cooperating with the comb body to form arecess, said member and the comb body having aligned openings forming awindow,'a rotatable control knob positioned within-said window, a-piniongear in the recess secured for rotation with said knob, a carrier for asharpened blade mounted for transverse sliding movement on the combbody, the carrier having a flange slidably mounted in said'groove and aguide rail received in-said recess, and a rack "having aligned openingsforming a window, a

rotatable control knob positioned within said window and projecting fromboth sides thereof,

a pinion-gear inthe recess secured for rotation 'withsaidknob,a-carrier' for a sharpened blade 'mounted for transverse *slidingmovement on the comb bod-y, the carrier having a flange slidably mountedin said groove and a'guide rail received by the comb bodywi-thinsaid-recess; the carrier also having a guide rail slidably'receivedwithin said guide channel, a rack formed on'theend of the carrierandpositioned between the pinion gear and thebomb bodywhereby-rotationof'the knob and gear serve-toadvance and retract thecarrier.

5. Ina hair trimmer, 3 the combination of a comb body having a hp at oneend defining a groove, .a :member attached to the comb body intermediatethe ends thereof cooperating with the comb body to form a recess, saidmember and the comb body having aligned openings forming tion is of thefull scope of the appended claims, a window, a rotatable control knobpositioned within said window, the knob being offset with respect to thecomb body so that it projects rearwardly through the window for arelatively small distance, a pinion gear in the recess secured coaxiallyto the knob for rotation therewith, a carrier for a sharpened blademounted for transverse sliding movement on the forward side of the combbody, the carrier having a flange slidably mounted in said groove and aguide rail received in said recess, and a rack formed on the end of thecarrier adjacent the guide rail and positioned between the pinion gearand the comb body whereby rotation of the knob and gear serve to advanceand retract the carrier.

6. In a hair trimmer, the combination of: a comb body, a member attachedto the comb body intermediate the ends thereof cooperating with the combbody to form a recess, a rotatable control knob ofiset with respect tothe comb body and rotatable about an axis parallel to the longitudinalaXis of the comb body, a pinion gear in the recess secured for rotationwith said knob, a carrier for a sharpened blade mounted for transversesliding movement on the comb body, the carrier having a guide railreceived in said recess, and a rack formed on the end of the carrieradjacent the guide rail and positioned between the pinion gear and thecomb body Whereby rotation of the knob and gear serve to advance andretract the carrier.

'7. In a hair trimmer, the combination of: a comb body, a memberattached to the comb body intermediate the ends thereof cooperating withthe comb body to form a recess, said member and the comb body havingaligned openings forming a window, a rotatable control knob positionedwithin said window and rotatable about an axis parallel to thelongitudinal axis of the comb body, said member and the comb body alsohaving aligned openings forming spaced bearings for the rotatablecontrol knob, a pinion gear in the recess secured for rotation with saidknob, a carrier for a sharpened blade mounted for transverse slidingmovement on the comb body, the carrier having a guide rail received insaid recess, and a rack formed on the end of the carrier adjacent theguide rail and positioned between the pinion gear and the comb bodywhereby rotation of the knob and gear serve to advance and retract thecarrier.

8. In a hair trimmer, the combination of a comb body, a half bridgemember attached to the comb body intermediate the ends thereofcooperating with the comb body to form a recess, the half bridge memberand the comb body each havinga guide channel positioned in said recess,a carrier for a sharpened blade mounted for transverse sliding movementon the comb body, the carrier having a first guide rail received Withinthe channel on the comb body and a second guide rail received within thechannel on the half bridge member, and cooperating parts including apinion gear meshing with a rack formed on the carrier for advancing andretracting the carrier relative to the comb body.

NORBERT SHAEFFER.

No references cited.

